During 1999-2000, six rounds of the Intensified Pulse Polio Immunisation (IPPI) programme were organized—four nationwide rounds, once a month from October 1999 to January 2000, and two more sub-national rounds in eight States—Gujarat, Rajasthan, Madhya Pradesh, Bihar, Uttar Pradesh, Orissa, Assam and West Bengal.
En 1999-2000 se organizaron seis series de vacunación intensiva contra la poliomielitis (IPPI), cuatro a nivel nacional una vez al mes de octubre de 1999 a enero de 2000, y dos más en los Estados de Gujarat, Rajasthan, Madhya Pradesh, Bihar, Uttar Pradesh, Orissa, Assam y West Bengal.